Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0de3aa58a1c065c…

MALICIOUS

PDF

48.3 KB Created: 2020-07-29 06:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93076c330b04d7d6604d5e3e7cad974e SHA-1: 30498566471b2465485d4c855b3b5f447f295590 SHA-256: b0de3aa58a1c065cf218407199a6d5de6cc421f64c3c171b935ca51ea1159545
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified as a PDF link farm. One of these links points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to an 'increment request letter template', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=increment+request+letter+template
    • http://files.patticarmen.com/uploads/1/3/2/6/132696111/20d3046.pdf
    • http://files.wrenphotographynd.com/uploads/1/3/0/9/130969657/woxafot.pdf
    • http://files.victorjoelortiz.com/uploads/1/3/2/6/132680986/lixidapu.pdf
    • http://files.wooftapetshop.com/uploads/1/3/1/4/131454034/3540123.pdf
    • http://files.wrenphotographynd.com/uploads/1/3/0/9/130969657/woxafot.p
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13534048661.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/disagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/55038874699.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5868/files/jefabofirekiriseve.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/35851645816.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1121/files/nozowefasuvalowa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0879/3510/files/zotedogun.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/relupivewufewafalutugeli.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/879153176.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/94089666866.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/3302197352.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/86575445955.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e93.bin
3b1512b8178010d1e289a3c8cede12b21d30d0808d86282bd7b4ed22993fcbea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E93 4864 bytes
font_01_sfnt_off00008ef1.bin
3118eaa7bfb7537bd57d1bacbd763bab9fea7ab29b2de9367d42cd55d1f58892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF1 10936 bytes

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